Competing/conflicts of interest: No stated conflict of interest.
Anatomy of Tenons capsule
Article first published online: 20 FEB 2012
© 2011 The Authors. Clinical and Experimental Ophthalmology © 2011 Royal Australian and New Zealand College of Ophthalmologists
Clinical & Experimental Ophthalmology
Volume 40, Issue 6, pages 611–616, August 2012
How to Cite
Kakizaki, H., Takahashi, Y., Nakano, T., Asamoto, K., Ikeda, H., Ichinose, A., Iwaki, M., Selva, D. and Leibovitch, I. (2012), Anatomy of Tenons capsule. Clinical & Experimental Ophthalmology, 40: 611–616. doi: 10.1111/j.1442-9071.2011.02745.x
Funding sources: No stated funding sources.
- Issue published online: 13 AUG 2012
- Article first published online: 20 FEB 2012
- Accepted manuscript online: 15 DEC 2011 05:44AM EST
- Received 29 May 2011; accepted 1 November 2011.
- anterior Tenons capsule;
- orbital fat;
- orbital smooth muscle network;
- posterior Tenons capsule
Background: The microscopic and macroscopic anatomy of the anterior and posterior Tenons capsule is described.
Methods: An observational anatomic study of twelve orbits of 6 cadavers (mean age 79.5 years) were examined microscopically and 8 orbits of 4 cadavers (mean age 76.8 years) were examined macroscopically. After orbital exenteration, an X-shaped incision was made in the specimens to include the posterior part of the globe. The sections were divided into four parts: superomedial; inferomedial; superolateral; and inferolateral. In the macroscopically examined specimens, the eyelids and globes were removed from the exenterated tissues and the appearance of Tenons capsule was studied.
Results: In the microscopic study, Tenons capsule covered the sclera beneath the conjunctiva and contained smooth muscle fibres in the anterior area. This anterior fascia, which had a thick appearance, reached the globe equator. From there, the capsule of the orbital fat, which contained no smooth muscle fibres, enveloped the sclera and reached the optic nerve. This was defined as the posterior capsule. In the macroscopic specimens, Tenons capsule had a thick and fibrous white appearance in the anterior area. More posteriorly, the capsule was thinner and more translucent. This thin capsular part was generally larger in the lateral area than in the medial area.
Conclusions: Tenons capsule is composed of an anterior thick fibrous tissue comprising the orbital smooth muscle network and the posterior thin fibrous capsule of the orbital fat.